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Kudzanai Mabika
Java and MySQL
1 Answer(s)      a year and 7 months ago
Posted in : Java Beginners


I am doing a project on an accounting system. I need to know to things:

  1. How do I write reports using information in an MySQL database .

  2. How get multiple MySQL database rows and assign them to variables r an array in java. Please help!!!


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May 20, 2013 at 1:05 PM


hi friend,

MySQL contains no form or reporting tools. To write and represent a report using MySQL and Java, you must have to extract the data from the database and then you have to write java code for representing the report. You can read data from the database and can write it into the excel file.

You may go through the link to know how to read data from database and write it into the excel file.

http://www.roseindia.net/tutorial/java/poi/insertIntoExcelFileData.html

To assign database rows values in an array variables, you write your code like below

String sql = "SELECT * FROM register ";
    ps = con.prepareStatement(sql);
    ResultSet rs = ps.executeQuery();   
    rs.last();
    int numberOfRows = rs.getRow(); 
    int arr [] = new int [numberOfRows]; 
    rs.beforeFirst();
    for (int i = 0; i < arr.length; i++)
    {
    while(numberOfRows > 0 && rs.next())
    {
        arr[i] = rs.getInt("id");
        out.println("id = "+arr[i]);        
    }
    }

Thanks.



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